Explaining how the iceberg formed, she said: "We get two types of icebergs: We get the type that everyone can envision in their head that sank the Titanic, and they look like prisms or triangles at the surface and you know they have a insane subsurface".

"What makes this one a bit unusual is that it looks nearly like a square", Brunt said, noting that it's a pretty fresh break.

They shared a striking image of the giant block, known as a tabular berg, after it was captured off the east coast of the Antarctic Peninsula, near the Larsen C ice shelf, according to The Sun.

Brunt said the iceberg could be unstable and break if someone were to walk on it.

"And then you have what are called "tabular icebergs". Brunt added that only about 10 percent of the iceberg's mass is visible, the rest being underwater.

A triangular iceberg was also seen nearby, surrounded by several different types of sea ice.

'Sentinel-1 SAR satellite imagery from 29 August 2018 shows that to the north of the iceberg the wind is pushing the sea ice northwards faster than the iceberg is rotating.

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